This weekend's Davis Cup should generate at least $7.1 million of tourist spending for area hotels, restaurants, retailers and transportation providers, according to estimates by event organizers.

The Oregon Sports Authority, which helped lure the event to Portland, said Tuesday that 62 percent of the 12,000-or-so ticketbuyers hail from outside Oregon. The three-day competition begins Friday and features professional tennis teams from Russia and the United States.

Not counting ticketholders, Davis Cup officials, team delegations, sponsors and covering media have booked 3,848 room nights during the event, said Meyer Freeman, chief operating officer for the organization, which promotes sporting events.

The 503-room Portland Marriott Downtown Waterfront is sold out Thursday, Friday and Saturday nights, mostly because of the Davis Cup, said Dan Carraher, director of sales & marketing at the hotel, which is hosting the Russian team. A weekend convention accounts for about half of the room bookings, he said, but "honestly, if it wasn't for that convention, we probably would've sold the remaining rooms to Davis Cup attendees." The Russian team and its delegation occupy 50 of the rooms, Carraher said.